| 摘要 |
PROBLEM TO BE SOLVED: To provide the subject method for obtaining a transport fuel of high added value comprising introducing a hydrocarbon feed including gas oil into a cracking reactor where the hydrocarbon feed is treated under specified conditions to convert it to low-molecular weight hydrocarbons. SOLUTION: This method comprises the following steps: a hydrocarbon feed including gas oil and residual oil is introduced into the 1st cracking reactor 4 where the hydrocarbon feed is contacted with a fluidized cracking catalyst to produce a product stream comprising a relatively light product fraction and heavy product fractions 24, 25 comprising aromatic hydrocarbons, the prodctct stream is then withdrawn from the 1st reactor 4, the light product fraction and the heavy product fractions being separated, part of the heavy product fractions thus separated is then introduced into a hydrogenation reactor 26 where it is contacted with a hydrogenation catalyst for (partially) saturating the aromatic hydrocarbons in the partial heavy fractions, part of the resulting hydrogenation product being subsequently introduced into the 2nd cracking reactor 12 where it is contacted with a fluidized cracking catalyst under conditions effective for converting the hydrogeneration product to a relatively low- molecular weight product, thus converting the relatively high-molecular weight hydrocarbons to relatively low-molecular weight hydrocarbons.
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